Numerical Solution of Incompressible Laminar Boundary Layer Problems Using Invariant Imbedding PDF Download
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Author: Harry Philip Horton
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
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Author: Harry Philip Horton
Publisher:
ISBN:
Category :
Languages : en
Pages : 25
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Author: Victor Zakkay
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Book Description
Numerical solutions of the boundary layer equations with arbitrary initial profiles and an assigned constant wall shear stress were carried out. Results show that after an initial non-similar flow all initial profiles for incompressible flow asymptotically approach similar profiles corresponding exactly to the Falkner-Skan similar solution. The streamwise distance required for any arbitrary initial profile to approach this similar profile depends upon the extent of departure of the initial profile from the beta = 1/2 similar profile (the larger the difference the longer the distance). For compressible boundary layers, constant wall shear stress solutions give rise to asymptotic locally similar profiles, with no particular similar profile having been determined in the present analysis. (Author).
Author: Stephen C. Lubard
Publisher:
ISBN:
Category : Boundary element methods
Languages : en
Pages : 27
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Book Description
A new approach to the numerical solution of the steady boundary layer equations is presented. The technique is developed in detail here for incompressible, laminar problems; the extension to compressible and/or turbulent flow is straightforward. Normal derivatives are approximated by finite differences yielding a nonlinear system of ordinary differential equations which is integrated in the streamwise direction starting from an initial velocity profile. The method is applicable to arbitrary choices of the initial profile, the pressure gradient and/or the injection or suction distribution. The classical Howarth Problem and the boundary layer on a circular cylinder are solved as test cases; velocity profiles, skin friction and the separation point are all predicted accurately. The solution for a flat plate with constant injection is then presented and compared with previous approximate results. As a final example, flow around a porous circular cylinder with various rates of injection is treated. (Author).
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 970
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Anthony W. Fiore
Publisher:
ISBN:
Category : Turbulent boundary layer
Languages : en
Pages : 962
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Book Description
In 1975 the U.S. Air Force and the Federal Republic of Germany signed a Data Exchange Agreement numbered AF-75-G-7440 entitled 'Viscous and Interacting Flow Fields.' The purpose was to exchange data in the area of boundary layer research. It includes both experimental and theoretical boundary layer research at speeds from subsonic to hypersonic Mach numbers in the presence of laminar, transitional, and turbulent boundary layers. The main effort in recent years has been on turbulent boundary layers, both attached and separated in the presence of such parameters as pressure gradients, wall temperature, surface roughness, etc. In the United States the research was conducted in various Department of Defense, NASA, aircraft corporations, and various university laboratories. In the Federal Republic of Germany it was carried out within the various DFVLR, industrial, and university research centers.
Author: Louis Rosenhead
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 770
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Book Description
This book is sure to be of interest to the many different types of specialists who now make use of the ideas, methods, and results boundary-layer theory, including applied mathematicians and engineers as well as experimental physicists and chemists working in fields as diverse as aerodynamics, hydraulics, meteorology, oceanography, and heat and mass transfer.
Author: Donald Charles Baxter
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 620
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Author: John M. Klineberg
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 108
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Book Description
Iterative finite-difference techniques are developed for integrating the boundary-layer equations, without approximation, through a region of reversed flow. The numerical procedures are used to calculate incompressible laminar separated flows and to investigate the conditions for regular behavior at the point of separation. Regular flows are shown to be characterized by an integrable saddle-type singularity that makes it difficult to obtain numerical solutions which pass continuously into the separated region. The singularity is removed and continuous solutions ensured by specifying the wall shear distribution and computing the pressure gradient as part of the solution. Calculated results are presented for several separated flows and the accuracy of the method is verified. A computer program listing and complete solution case are included.
Author: N. Curle
Publisher: Courier Dover Publications
ISBN: 0486812391
Category : Science
Languages : en
Pages : 177
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Book Description
Thorough introduction to boundary layer problems offers an ordered, logical presentation accessible to undergraduates. The text's careful expositions of the limitations and accuracy of various methods will also benefit professionals. 1962 edition.
Author: Douglas Aircraft Company
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 76
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